In-game reset:
Hold L1 + L2 + R1 + R2 and press Start + Select
during game play.
Kaneyo Mosquito:
Hold L1 and quickly press Up, Right, Left, Down,
Square(2), R1(3) at the character selection screen.
A shout will confirm correct code entry.
Kenichi Mosquito:
Enable the "Kaneyo Mosquito" code. Then, hold L2 and
quickly press Up, Right, Left, Down, Square(2), R2(3)
at the character selection screen. A shout will confirm
correct code entry.
Two player duel mini-game:
Hold Start + Select on controller two after turning on
the system. Press Square to move forward, X to jump, and
Triangle (when the power meter is full) to do a rocket
attack. Knock your opponent out of the ring to win.
Reckless Cyclist mini-game:
Rotate the Right Analog-stick thirty times at the title
screen. Alternately, hold L2 and continuously rotate the
Right Analog-stick clockwise at the title screen.
Year 2:
Fill each of the sixteen Ex Tanks to unlock Year 2.
Special costume:
Unlock all alternate costume colors on every level.
Sites: